World Radiocommunication Conference (WRC-19) Sharm el-Sheikh, Egypt, 28 October – 22 November 2019 PLENARY MEETING Addendum 6 to Document 6331-E 5 September 2019 Original: English Member States of the Inter-American Telecommunication Commission (CITEL) PROPOSALS FOR THE WORK OF THE CONFERENCE Agenda item 1.6 1.6 to consider the development of a regulatory framework for non-GSO FSS satellite systems that may operate in the frequency bands 37.5-39.5 GHz (space-to-Earth), 39.5-42.5 GHz (space-to-Earth), 47.2-50.2 GHz (Earth-to-space) and 50.4-51.4 GHz (Earth-to-space), in accordance with Resolution 159 (WRC-15); BACKGROUND INFORMATION: Article 22 of the Radio Regulations contains provisions to ensure compatibility of non-GSO FSS operations with GSO networks for the 14/11 GHz and 30/20 GHz bands. Among these provisions are uplink and downlink equivalent power flux density (epfd↑ and epfd↓) limits to protect GSO networks from unacceptable interference pursuant to RR No. 22.2. There are currently no defined technical provisions for sharing between non-GSO systems and GSO networks in the 50/40 GHz frequency bands. Moreover, there are no existing mechanisms in the RR establishing coordination procedures applicable to non-GSO systems operating within the FSS allocations in frequency bands in the 37.5 to 51.4 GHz range, such as application of RR No. 9.12. To address these issues, and the uncertainty they create among potential operators of non-GSO FSS satellite systems in this 50/40 GHz range, WRC-15 established agenda item 1.6 and associated Resolution 159 (WRC-15) for WRC-19. Resolution 159 (WRC-15) discusses the development of new technologies in the Fixed Satellite Service (FSS) in frequency bands above 30 GHz that would allow for the provision of high-capacity and low-cost communications in all parts of the world, especially in remote and isolated areas. This Resolution considers that satellite constellations in both geostationary-satellite orbits (GSO) and non-geostationary-satellite orbits (NGSO) would allow for the implementation of these new technologies in the FSS bands and that the Radio Regulations should enable the introduction of such technologies to ensure efficient use of the radio spectrum. Resolution 159 (WRC-15) resolves to invite the ITU-R to conduct and complete in time for WRC- 19 studies on the regulatory provisions to enable the operation of NGSO FSS satellite systems in the above mentioned frequency bands, including sharing studies with GSO, EESS, and RAS. HTTP://OASFILES/PSO/CITEL/DOCUMENTS/CCP.II-RADIO/CMR-19-WRC/CITEL IAPS/CITEL IAPS/1.6/R16-WRC19-C-6331!A6!MSW- E.DOCX 2 CMR19/6331(Add.6)-E The proposals below present a regulatory solution for providing certainty and technical provisions to allow for sharing between non-GSO FSS systems and for protection of co-frequency GSO networks and adjacent-band EESS (passive) systems under WRC-19 AI 1.6. The proposals have been developed based on the results of ITU-R studies called for in Resolution 159 (WRC-15), and identify a methodology to allow for maximum spectrum efficiency for non-GSO FSS systems, while protecting operations of GSO networks from operations of non-GSO FSS systems. This proposal also provides a regulatory solution to ensure that aggregate emissions from operating non- GSO FSS systems do not exceed aggregate protection requirements of GSO networks. For sharing between GSO and non-GSO systems: Regarding the protection of GSO systems, CITEL supports the following approach of defining in the Radio Regulations: a) a maximum value for the time allowance for degradation exceeding the minimum short-term performance objectives, in terms of C/N, of a set of GSO reference links due to the interference caused by a single non-geostationary system, as well as the aggregate value for all NGSO FSS systems; and b) a maximum value for the decrease in the time-averaged spectral efficiency (throughput) caused by a single non-GSO system, as well as the aggregate value for all NGSO FSS systems, into a set of GSO reference links using adaptive coding and modulation to satisfy the long-term performance objectives This proposal is similar to Method A of Issue 1 in the CPM Report, with new Resolutions that contain both the calculation procedures and GSO reference links for sharing between non-GSO systems and GSO networks. For sharing between NGSO systems: Studies on sharing conditions between non-GSO FSS systems operating in the frequency bands 37.5-42.5 GHz (space-to-Earth) and 47.2-48.9 GHz (limited to feeder links only), 48.9-50.2 GHz and 50.4-51.4 GHz (all Earth-to-space) have shown the possible effectiveness of mitigation techniques such as orbital angle avoidance and earth station site diversity in assisting NGSO operators to achieve compatibility between the non-GSO FSS systems studied. To address sharing considerations between NGSO systems, that the use of the bands 37.5-39.5 GHz (space-to-Earth), 39.5-42.5 GHz (space-to-Earth), 47.2-50.2 GHz (Earth-to-space) and 50.4-51.4 GHz (Earth-to-space) by non-GSO FSS systems should be subject to coordination procedures under No. 9.12. For the protection of EESS (passive) systems and modifications to Resolution 750 (Rev. WRC15): For the band 36-37 GHz, based on the results of studies, EESS (passive) systems operating in the 36- 37 GHz band and non-GSO FSS systems are compatible and no regulatory measures are required to address the compatibility between these two services. For the frequency band 50.2-50.4, it is proposed to modify Resolution 750 (Rev. WRC-15) to introduce new out of band emission limits for both GSO and non-GSO FSS stations. Studies have shown that GSO FSS systems alone cause exceedance to the EESS (passive) protection criteria and HTTP://OASFILES/PSO/CITEL/DOCUMENTS/CCP.II-RADIO/CMR-19-WRC/CITEL IAPS/CITEL IAPS/1.6/R16-WRC19-C-6331!A6!MSW- E.DOCX 3 CMR19/6331(Add.6)-E that in order to allow the aggregate interference from both GSO and non-GSO FSS stations emission to meet these criteria, modifications to both limits are needed. The proposed limits are independent of the type of earth station antenna. It is recognized that small ubiquitously-deployed user terminals greatly outnumber larger gateway-type stations. Further consideration of whether additional limits to address the effect of aggregate interference from such FSS user terminals may be required. Additionally, FSS user terminals generally operate with lower transmit power into their antennas, and as such may be able to accommodate a reduction in out-of- band emissions. With respect to non-GSO FSS systems, the use of mitigation techniques in the bands adjacent to the 50.2-50.4 GHz band would obviate the need for stringent levels of unwanted emissions. These methods include angular avoidance, uplink power control and other operational means. Less stringent out of band emission limits could be considered if such mitigation techniques are shown to reduce the interference into EESS and can be mandatory. This can be studied in time for WRC-19 and could lead to additional proposals. HTTP://OASFILES/PSO/CITEL/DOCUMENTS/CCP.II-RADIO/CMR-19-WRC/CITEL IAPS/CITEL IAPS/1.6/R16-WRC19-C-6331!A6!MSW- E.DOCX 4 CMR19/6331(Add.6)-E ARTICLE 5 Frequency allocations Section IV – Table of Frequency Allocations (See No. 2.1) MOD IAP/6331A6/1 34.2-40 GHz Allocation to services Region 1 Region 2 Region 3 37.5-38 FIXED FIXED-SATELLITE (space-to-Earth) ADD 5.A16 MOBILE except aeronautical mobile SPACE RESEARCH (space-to-Earth) Earth exploration-satellite (space-to-Earth) 5.547 38-39.5 FIXED FIXED-SATELLITE (space-to-Earth) ADD 5.A16 MOBILE Earth exploration-satellite (space-to-Earth) 5.547 39.5-40 FIXED FIXED-SATELLITE (space-to-Earth) 5.516B MOBILE MOBILE-SATELLITE (space-to-Earth) Earth exploration-satellite (space-to-Earth) 5.547 ADD 5.A16 Reasons: To insert provisions for coordination among non-GSO satellite services MOD IAP/6331A6/2 40-47.5 GHz Allocation to services Region 1 Region 2 Region 3 40-40.5 EARTH EXPLORATION-SATELLITE (Earth-to-space) FIXED FIXED-SATELLITE (space-to-Earth) 5.516B MOBILE MOBILE-SATELLITE (space-to-Earth) SPACE RESEARCH (Earth-to-space) Earth exploration-satellite (space-to-Earth) ADD 5.A16 HTTP://OASFILES/PSO/CITEL/DOCUMENTS/CCP.II-RADIO/CMR-19-WRC/CITEL IAPS/CITEL IAPS/1.6/R16-WRC19-C-6331!A6!MSW- E.DOCX 5 CMR19/6331(Add.6)-E 40.5-41 40.5-41 40.5-41 FIXED FIXED FIXED FIXED-SATELLITE FIXED-SATELLITE FIXED-SATELLITE (space-to-Earth) ADD 5.A16 (space-to-Earth) 5.516B ADD (space-to-Earth) ADD 5.A16 BROADCASTING 5.A16 BROADCASTING BROADCASTING-SATELLITE BROADCASTING BROADCASTING-SATELLITE Mobile BROADCASTING-SATELLITE Mobile Mobile 5.547 Mobile-satellite (space-to-Earth) 5.547 5.547 41-42.5 FIXED FIXED-SATELLITE (space-to-Earth) 5.516B ADD 5.A16 BROADCASTING BROADCASTING-SATELLITE Mobile 5.547 5.551F 5.551H 5.551I 47.2-47.5 FIXED FIXED-SATELLITE (Earth-to-space) 5.552 ADD 5.A16 MOBILE 5.552A Reasons: To insert provisions for coordination among non-GSO satellite services MOD IAP/6331A6/3 47.5-51.4 GHz Allocation to services Region 1 Region 2 Region 3 47.5-47.9 47.5-47.9 FIXED FIXED FIXED-SATELLITE FIXED-SATELLITE (Earth-to-space) 5.552 ADD 5.A16 (Earth-to-space) 5.552 ADD MOBILE 5.A16 (space-to-Earth) 5.516B 5.554A MOBILE 47.9-48.2 FIXED FIXED-SATELLITE (Earth-to-space) 5.552 ADD 5.A16 MOBILE 5.552A 48.2-48.54 48.2-50.2 FIXED FIXED FIXED-SATELLITE FIXED-SATELLITE (Earth-to-space) 5.516B 5.338A 5.552 (Earth-to-space) 5.552 ADD ADD 5.A16 5.A16 MOBILE (space-to-Earth) 5.516B 5.554A 5.555B MOBILE HTTP://OASFILES/PSO/CITEL/DOCUMENTS/CCP.II-RADIO/CMR-19-WRC/CITEL